CAT93C76

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3

Instruction

Start

Bit

Opcode

Address

Data

Comments

x8

x16

x8

x16

READ

1

10

A10−A0

A9−A0

Read Address AN– A0

ERASE

1

11

A10−A0

A9−A0

Clear Address AN– A0

WRITE

1

01

A10−A0

A9−A0

D7−D0

D15−D0

Write Address AN– A0

EWEN

1

00

11XXXXXXXXX

11XXXXXXXX

Write Enable

EWDS

1

00

00XXXXXXXXX

00XXXXXXXX

Write Disable

ERAL

1

00

10XXXXXXXXX

10XXXXXXXX

Clear All Addresses

WRAL

1

00

01XXXXXXXXX

01XXXXXXXX

D7−D0

D15−D0

Write All Addresses

6. Address bit A10 for the 1,024x8 org. and A9 for the 512x16 org. are “don’t care” bits, but must be kept at either a “1” or “0” for READ, WRITE

and ERASE commands.

Table 6. A.C. CHARACTERISTICS

Symbol

Parameter

Test Conditions

Limits

Units

Min

Max

Min

Max

CS Setup Time

100

50

ns

CS Hold Time

0

0

ns

DI Setup Time

100

50

ns

DI Hold Time

100

50

ns

Output Delay to 1

250

150

ns

Output Delay to 0

250

150

ns

Output Delay to High−Z

150

100

ns

Program/Erase Pulse Width

5

5

ms

Minimum CS Low Time

200

150

ns

Minimum SK High Time

250

150

ns

Minimum SK Low Time

250

150

ns

Output Delay to Status Valid

250

100

ns

Maximum Clock Frequency

DC

1000

DC

3000

kHz

7. The input levels and timing reference points are shown in the “AC Test Conditions” table.

8. These parameters are tested initially and after a design or process change that affects the parameter.

Symbol

Parameter

Max

Units

Power−up to Read Operation

1

ms

Power−up to Write Operation

1

ms

Table 8. A.C. TEST CONDITIONS

Input Rise and Fall Times

≤ 50 ns

Input Pulse Voltages

0.4 V to 2.4 V

Timing Reference Voltages

0.8 V, 2.0 V

Input Pulse Voltages

Timing Reference Voltages